Category: Systems

Just random stuff - Nothing to see here - Move along...

Adding Additional Storage for Docker

NOTE: I added an additional 128G disk via VMware which is seen as: /dev/sdb I created (1) 25G partition to be allocated for the /var/log/ciena partition # fdisk -l Disk /dev/sdb: 134.2 GB, 134217728000 bytes, 262144000 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes…
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How-to Change ILAN on single host Ciena MCP/BluePlanet Install – After the fact

If you started your MCP/BluePlanet install and later found that you have a conflict with the default network it uses for its containers, you will need to change it. Here’s a quick how-to…

kernel: php-fpm: segfault at x ip y sp z error 6 in libpcre.so.1.2.0

An issue with php70-php-fpm Perl PCRE causing some segfaults every once in a while. Current pcre/jit details from phpinfo: # php -r “phpinfo();” |egrep -i “pcre|jit” auto_globals_jit => On => On pcre PCRE (Perl Compatible Regular Expressions) Support => enabled PCRE Library Version => 8.32 2012-11-30 PCRE JIT Support => enabled pcre.backtrack_limit => 1000000 =>…
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Load Balancing with KEMP and CentOS Backend Services

L4 or L7 for Load balancing? For web services, go the L7 route and route all the traffic through the LB (as a default route) to get the benefits.  With DNS, I chose to use the L4 route.. each with their different configurations. Testing the KEMP LoadMaster in a config similar to this: Internet –> Firewalls…
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Nginx for SSL Termination to Varnish & Apache Backend with WordPress

System Architecture for Scaling Virtual Environment All traffic should have ssl certs installed for each domain at nginx level.  Nginx is configured as ssl proxy only.  Certs are provided by Let’s Encrypt unless otherwise needed for other purposes. (non-secure) Varnish (80) –> Apache (8080) –> Redis –> MariaDB (secure) Nginx (as ssl proxy) (443) –>…
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